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Supposedly yes, according to the sources at theflyonthewall. An announcement of a merger between the two largest satellite radio companies, XM and Sirius, is expected to be announced at the North American International Auto Show in Detroit later today. I still unsure if this would be a good move. Being a Sirius listener and fan I enjoy everything about the stations as it is and I don't want to see a merge of content losing stations and gaining other undesireable ones. And what about the hardware? Will I have to buy a new receiver to accommodate the possible merger. There are too many hurdles to overcome for this to work out successfully.

XM-Sirius Merger Plans to be Announced Today? [Orbitcast]